Mint chocolate chip hot fudge brownie sundae....mmmmmm
Back in the 70's and 80's dad ran Kendall GT-1 20w-50 in a fleet of mopar taxi cabs. Had them on a monthly service rotation. Keep in mind a month on a taxi can be 10-20k miles. Most of them saw upwards of 300k miles on the 318's and over 600k on the slants. Put a spare 500k slant in a 71 dart in high school.